#B31F28#B31F28

#B31F28 is a mid, vivid red. Relative luminance 0.107; OKLCH L 49.7% C 0.182 H 24.5°. Best body text is #FFFFFF at 6.68:1 contrast (WCAG AA passes).

Color values

HEX	#B31F28
RGB	rgb(179, 31, 40)
HSL	hsl(356, 70%, 41%)
HSV	hsv(356, 83%, 70%)
CMYK	cmyk(0%, 82.7%, 77.7%, 29.8%)
CIE-LAB	lab(39.10, 57.20, 34.26)
CIE-LCH	lch(39.10, 66.68, 30.92°)
OKLab	oklab(49.72% 0.1656 0.0755)
OKLCH	oklch(49.72% 0.182 24.5)
XYZ	xyz(19.4658, 10.7200, 3.0513)
Luminance	0.1072 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B31F28 #1FB3AA

analogous

#B31F72 #B31F28 #B3601F

triadic

#B31F28 #28B31F #1F28B3

tetradic

#B31F28 #72B31F #1FB3AA #601FB3

square

#B31F28 #72B31F #1FB3AA #601FB3

split-complementary

#B31F28 #1FB360 #1F72B3

monochromatic

#4B0D11 #7F161C #B31F28 #DC333E #E5686F

Accessibility & contrast

On white

6.68

#B31F28 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.14

#B31F28 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B31F28

6.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B31F28	#FFFFFF	#000000	##FFFFFF
##B31F28	1.00	6.68	3.14	6.68
#FFFFFF	6.68	1.00	21.00	1.00
#000000	3.14	21.00	1.00	21.00
##FFFFFF	6.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4F4827

Deuteranopia (green-blind)

#736722

Tritanopia (blue-blind)

#C50024

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #b31f28;
/* rgb */ color: rgb(179, 31, 40);
/* oklch */ color: oklch(49.7% 0.182 24.5);

Tailwind

colors: {
  custom: {
    50: '#d36b62',
    500: '#b31f28',
    950: '#000000',
  },
}

SCSS

$custom: #b31f28;
$custom-light: #d36b62;
$custom-dark: #000000;

JSON

{
  "hex": "#b31f28",
  "rgb": {
    "r": 179,
    "g": 31,
    "b": 40
  },
  "hsl": {
    "h": 356.351,
    "s": 70.476,
    "l": 41.176
  },
  "oklch": {
    "l": 0.49724,
    "c": 0.18199,
    "h": 24.5
  },
  "luminance": 0.10717
}

Semantic roles & 50–950 ramp

primary

#B31F28

secondary

#64CAC4

accent

#EDE23B

background

#FEF6F5

surface

#FCECEA

border

#D5C7C6

text

#160805

muted

#847A79

Preview Lab

Preview with #B31F28

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →